roquefortine H

(3E,5aS,10bR,11aS)-5a-Methyl-10b-(2-methyl-3-buten-2-yl)-3-{[1-(2-methyl-4-oxo-2-pentanyl)-1H-imidazol-4-yl]methylene}-6,10b,11,11a-tetrahydro-2H-pyrazino[1',2':1,5]pyrrolo[2,3-b]indole-1,4(3H,5aH)-di
one